AttributeFix-Sync
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
⬇ Download on CurseForgeThe author built this one for Minecraft 1.21.1 on NeoForge. On other versions it may install and then do nothing.
AttributeFix Sync
AttributeFix Sync is an unofficial addon for the AttributeFix mod, designed to solve the synchronization issue where modified attribute limits on the server are not reflected on the client.
The Problem
In the original AttributeFix, if you modify the upper limit of an attribute (e.g., generic.max_health or generic.attack_damage) in the server configuration:
- The Server correctly calculates damage and health based on your config (e.g., capped at 5000).
- The Client still uses the default limit (e.g., 1,000,000).
- Result: Mods like Jade, WTHIT, or the vanilla health bar display incorrect values because the client isn't aware of the stricter limit enforced by the server.
Features
This mod solves the above problem via packet synchronization:
- Automatic Synchronization: When a player joins the server, the mod automatically sends all attribute limits (Max Values) configured on the server to the client.
- In-Memory Patching: Upon receiving the data, the client dynamically modifies the attribute definitions in memory via Mixin.
- Correct Visualization: Jade, WTHIT, and vanilla bars will now correctly display values based on the actual server limits.
- Pollution-Free: When the player disconnects, the mod automatically restores the client's attribute limits to their original state, ensuring single-player worlds or other servers are not affected.
Installation & Usage
Dependencies
- Minecraft: 1.21.1
- Loader: NeoForge
- Required Mod: AttributeFix
Usage
- Server: Required. No configuration needed. It automatically reads the final values from AttributeFix and sends them to players.
- Client: Required. Necessary to receive the synchronization packets.
Configuration
The client configuration file can be found at config/attributefixsync-client.toml.
| Option | Default | Description |
|---|---|---|
enableSync |
true |
Whether to accept attribute limit synchronization from the server. |
showSyncMessages |
true |
Whether to show a chat message when attributes are synchronized. |
Note: To change the actual attribute limits (e.g., max health), please edit the AttributeFix config files located in config/attributefix/.
License & Credits
This project is licensed under the MIT License.
- Core logic is based on the Minecraft NeoForge API.
- Special thanks to Darkhax for developing the original AttributeFix mod. This mod exists solely as a supplementary tool for it.
This is not an official work by Darkhax. If you have issues related to synchronization, please report them to this repository, not the original author.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as attributefixsync-0.0.2.jar — drop this file into the mods folder
- Download size: 25 KB
- Download link checked 3 Oct 2026 — working
These come from our own check of the pack file, not from the source page.